Compound of blown oils



I dize, that will be proof against water and the bi11ing this nitro cellulose with the blown oil Urrn WALTER D. FIELD, OF MILBURN, NEW JERSEY.

COMPOUND OF BLOWN o|| s.

SPECIFICATION forming part of Letters Patent No. 491,880, dated February 14, 1893.

Application filed October 18, 1892. Serial No. 449.286. (No specimens.)

To all whom it may concern:

Be it known that I, WALTER D. FIELD, a citizen of the United States, residing at Milburn, in the county of Essex, in the State of New Jersey, have invented certain new and useful Improvements in Compounds of Blown Oils and Products Therefrom and I do here bydeclaret the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to use the same.

My invention relates to that class of compounds which are used alone or in combination with other elements as a coating 'for textile fabrics,paperandleatherforinsulating purposes and for various other purposes too numerous to mention.

The object of the invention is to produce a compound that will be stable and durable, not liable to decompose or evaporate or oxiaction of the atmosphere and that can be made very flexible, while at the same time having great body, if desired. To accomplish these results I propose to use certain kinds of what are knownin the arts as blown oils in combination with pyroxyline or nitro cellulose, the resultant compound being used alone or in combination with other elements. The pyroxyline or nitro cellulose used in combination with the blown oils is of that grade or kind known in the arts as soluble pyroxyline or nitro cellulose and is obtained by subjecting vegetable fiber or cellulose to the action of nitric acid or to nitric and sulphuric acids, as is well understood, and before com- I would preferably dissolve the nitro cellulose in some solvent which also would be a solvent of the blown oil, andthen combine the same with the blown oil, as is hereinafter described.

I will proceed now to describe what I mean by blown oils: and what kinds of blown oils I propose to use. It is well known that the non-drying members of that group of oils which are chemically known as the glycyl ethers of the unsaturated fattyacids, increase in viscosity and stability when air is driven through them at various temperatures and some of the oils of the cotton seed grouphave been thus treated and afterward used for lubricating purposes. For the purposes of this invention I have most frequently used those glycyl ethers of the unsaturated fatty acids known as cotton seed oil and olive oil and have found them well adapted for my purposes, but any of the other oils belonging to the class of glycyl ethers of the unsaturated fatty acids excepting thereout those oils known as drying oils and chemically known as the linseed oil group, may be used, but some of them which containconsiderable proportions of the tri-glycerides of the saturated fatty acids are not as useful forall purposes as those oils that contain none or only small proportions of these triglycerides of the saturated fatty acids, but with these exceptions bilities as the oil and they may be produced of any desired degree of viscosity, even to the point of not flowing at all.

For my purposes I prepare this blown oil by forcing air through 1 the oil while it is at the temperature of about 200 centigrade until the oil is of about the proper degree of viscosity, which varies with the use to which the resultingproduct is to be put. The method of blowing air through these oils does not require description here,

as it may be done in any of the well known ways. While these blown oils may be made of almost any degree of viscosity, they do not have the property of drying when alone to a I hard film and they, therefore, are of no practical use for coating fabrics or for the other purposes of this invention when used inan uncombined state. These oils are thus distinguished from the oils known as drying oils whose drying qualities are greatly increased by blowing.

It is the object of this invention,therefore, to produce such a compound of these blown oils with some other substance, as Will dry to a smooth hard film and yet retain the flexibility of the oil, so that the same may be used as a coating in any of the methods which I have heretofore pointed out. And I have discovered that by combining pyroxyline in coinparatively small quantities with these blown oils, I can produce a compound, which when spread upon textile fabrics and other surfaces, will be tough, elastic and at the same time hard and smooth, water proof, not preceptibly affected by the atmosphere, and durable.

The amount of blown oil is regulated by the kind of product required. If it is desired to produce a Very flexible compound, a larger proportion of blown oil is used than if a comparatively stiff compound is desired. ButI have found the following proportions to be useful for a coating for textile fabrics: Blown oil one hundred and fifty parts, specific gravity .89, pyroxyline forty-five parts, both by weight.

In preparing my compounds I first dissolve the pyroxyline or nitro cellulose in a mixture of amyl acetate and benzine in the proportions of two parts of amyl acetate to one part benzine, reducing the pyroxyline solution to the consistency desired, but instead of amyl acetate I may use propyl or butyl acetates, or benzole and some other solvents of pyroxyline. After having dissolved the pyroxyline and reduced it to a proper consistency for mixing I gradually add the blown oil in small quantities at a time, with constant stirring, 0 and I regulate the amount of blown oil to be used in combination with the pyroXyline by the amount of flexibility desired in the resulting film. In my experience the lesser amount of oil gives the film the lesser-amount of flexibility and the greater amount of oil gives the greater amount of flexibility. To this compound I will add any desirable pigment for the purpose of coloring the compound and to a certain extentfor thepurpose of giving body to it, but care must be taken in adding the pigment not to add too great a Weight of pigment when the compound is to be spread upon fabrics and great flexibility and strength is desired, but when the compound is to be spread upon paper or other material the amount of the pigment may be increased.

What I claim as new is,

A new composition of matter consisting of a blown non-drying glycyl ether of an unsat urated fatty acid in combination with pyroXyline or nitro-cellulose, substantially as described.

In testimony whereof I aifix my signature in the presence of two witnesses.

WALTER D. FIELD.

YVitnesses:

WILLIAM S. DODD, (firms. W. BROWER. 

